plot scatter priority

Hello,

I have a problem to plot some data.

I use "plot" to plot some data and "scatter" for other. I obtain a plot whith the point trace with "scatter" are behind the points from "plot". I tried to change the order in the script but that change nothing.
Do you know how to do this? (I want use scatter because I want have a specific size for this points)

Thanks,

    Nicolas